How many years of comparable data are there for Guinea-Bissau and Tanzania?

25 years are reported by both, from 2000 to 2024.

Where does this data come from?

WHO/UNICEF Joint Monitoring Programme for Water Supply, Sanitation and Hygiene (2025) – processed by Our World in Data, published as Share of the population using improved water sources. Statizoid refreshes it automatically from the source and publishes the full history for both places.

Guinea-Bissau vs Tanzania: Share of the population using improved water sources

Guinea-Bissau

76.7%

in 2024

Tanzania

77.4%

in 2024

Guinea-Bissau rank

220th

Tanzania rank

218th

Share of the population using improved water sources over time

Guinea-Bissau
Tanzania

How they compare

Tanzania currently reports 77.4% against 76.7% in Guinea-Bissau, a difference of 0.7%.

The two have swapped places 1 time across 25 shared years of data; in 2000 it was Guinea-Bissau ahead.

Guinea-Bissau ranks 220th and Tanzania ranks 218th of 231 countries.

Guinea-Bissau has averaged higher in every one of the 3 decades both report.

Head to head by decade

Decade	Guinea-Bissau	Tanzania	Difference	Ahead
2000s	61.6%	44.2%	17.4%	Guinea-Bissau
2010s	70.6%	61.6%	9.0%	Guinea-Bissau
2020s	76.3%	74.2%	2.1%	Guinea-Bissau

Averages of every year both report within each decade.

Frequently asked questions

Which has higher share of the population using improved water sources, Guinea-Bissau or Tanzania?: Tanzania, at 77.4% against 76.7% in Guinea-Bissau as of 2024.
What is the difference in share of the population using improved water sources between Guinea-Bissau and Tanzania?: 0.7%, with Tanzania ahead.
How many years of comparable data are there for Guinea-Bissau and Tanzania?: 25 years are reported by both, from 2000 to 2024.
How do Guinea-Bissau and Tanzania rank globally for share of the population using improved water sources?: Guinea-Bissau ranks 220th and Tanzania ranks 218th of 231 countries.
Where does this data come from?: WHO/UNICEF Joint Monitoring Programme for Water Supply, Sanitation and Hygiene (2025) – processed by Our World in Data, published as Share of the population using improved water sources. Statizoid refreshes it automatically from the source and publishes the full history for both places.

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Guinea-Bissau vs Tanzania: Share of the population using improved water sources. Statizoid, drawing on WHO/UNICEF Joint Monitoring Programme for Water Supply, Sanitation and Hygiene (2025) – processed by Our World in Data. Retrieved 29 August 2026, from https://environment.statizoid.com/compare/share-of-the-population-using-improved-water-sources-wash/guinea-bissau/tanzania/

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<a href="https://environment.statizoid.com/compare/share-of-the-population-using-improved-water-sources-wash/guinea-bissau/tanzania/">Guinea-Bissau vs Tanzania: Share of the population using improved water sources</a> — Statizoid

About this data

Indicator: Share of the population using improved water sources
Unit: %
Source: WHO/UNICEF Joint Monitoring Programme for Water Supply, Sanitation and Hygiene (2025) – processed by Our World in Data
Licence: CC BY 4.0 (Our World in Data)
Coverage: 231 places, 5,586 data points, 2000–2024
Last refreshed: 28 August 2026

Proportion of people who use an improved drinking water source, regardless of collection time. An improved drinking water source is a safely designed drinking water source and includes e.g. piped water, boreholes or tubewells and packaged or delivered water.